- Destination Niagara USA
- Destination Resorts Hawaii, Wailea, Maui, HI
- Destinations Showcase
- Detroit Airport - Fairfield Inn by Marriott, MI
- Detroit Medical Center
- Detroit Metro Convention and Visitors Bureau
- Detroit Receiving Hospital
- Detroit Tigers
- Detroit West - Fairfield Inn by Marriott
- Detroit-Auburn Hills - Fairfield Inn by Marriott, MI
- Detroit-Madison Heights - Fairfield Inn by Marriott, MI
- Development Counselors International
- Development Dimensions Intl.
- Devine and Associate
- Devnet Inc.
- DevNet Systems Corporation
- Dewitt Hospital
- DH Elevation Consulting
- DHHS
- DHHS, OPHS, Region III
- DHL Global Customer Logistics, Inc.
- DHR Health
- DHR Health Transplant Institute
- DHR Transplant Institute
- Diagnostic Ultrasound
- Dial America Marketing, Inc.
- Dialysis Center of Lincoln Inc.
- Diamond Coach Corporation
- Diamond Head Beach Resort - Sunstream Hotel and Resorts
- Diamond Oil Co.
- Diana Byerly
- Dick's Sporting Goods
- Dickenson Community Hospital
- Dickson County Clerk
- Dictaphone Corp. EMS
- Diebold, Inc
- DietMaster Systems, Inc.
- Dietrich Industries, Inc.
- Digital Audiovisual Services Inc.
- Digital Designs Inc.
- Digital Preservation Strategies
- Dignity Health - Mercy General Medical Center
- Dignity Health - Mercy Hospital of Folsom
- Dignity Health - Methodist Hospital of Sacramento
- Dignity Health - Sierra Nevada Memorial Hospital
- Dignity Health - St. Rose Dominican Hospitals, Rose de Lima Campus
- Dignity Health - St. Rose Dominican Hospitals, San Martin Campus
- Dignity Health - St. Rose Dominican Hospitals, Siena Campus
- Dignity Health - Woodland Memorial Hospital
- Dignity Health Arizona General Hospital